Greenhouse Ventilation Rack and Pinion for Shading System Greenhouse Ventilation Rack price The continuous opening window system consist of opening screen gear motor, driving roller, pushing curtain gear and rack, and bearing block. PRODUCT PARAMETERS LengthThicknessHeight 1050mm2.0mm30mm 1250mm2.0mm30mm 1050mm2.5mm30mm 1250mm3.0mm30mm Greenhouse Ventilation Rack and Pinion FEATURES The continuous opening window system consist of opening screen gear motor, driving roller, pushing curtain gear and rack, and bearing block. In this system, gear motor implement window opening and closing work, through the drive shaft and drive the gear, the gear work with the rack to operate it to and fro movement. We can design and install farming and planting greenhouse for you according to your needs. You can choose single span greenhouse or multi span greenhouse, or contact us directly for the latest design! The main sales greenhouse accessories:Electric Roll Up Unit, Lock Channel, Lock Spring Wire, Rack Pinion, Greenhouse Film, Manual Film Reeler For more information about the Greenhouse Accessories, please click here.